{"product_id":"starrett-52252-mechanical-depth-micrometer-9-inch-9-rod","title":"Starrett 52252 Mechanical Depth Micrometer 9 Inch 9 Rod","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 52252 is a mechanical depth micrometer designed for precise depth measurement in metalworking, machining, and mechanical trade applications. It delivers a 9-inch maximum measurement range using a set of 9 interchangeable rotating rods, each with a 5\/32-inch (3.97 mm) diameter. Graduation is 0.001 inches with an accuracy rating of 0.0001 to 0.0002 inches, making it suitable for close-tolerance work. The 6-inch base length provides a stable reference surface across wide workpieces. A ratchet stop thimble ensures consistent measuring pressure on every reading, and a ring-type knurled lock nut secures the spindle quickly during measurement transfer.\u003c\/p\u003e\u003cp\u003eThis depth micrometer is used in machine shops, tool rooms, and production environments where accurate depth readings of bores, slots, steps, and counterbores are required. The 9-inch range and 9-rod configuration make it well suited for jobs that span a wide variety of depth increments without needing a separate gauge set. Licensed machinists, tool and die makers, and precision mechanics are the primary users. The unit ships with a protective case, keeping the rods and base organized and protecting calibrated surfaces during transport and storage.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e9-inch maximum measurement range with 9 interchangeable rotating rods\u003c\/li\u003e\n\u003cli\u003e0.001-inch graduation for fine incremental readings\u003c\/li\u003e\n\u003cli\u003eAccuracy of 0.0001 to 0.0002 inches for close-tolerance applications\u003c\/li\u003e\n\u003cli\u003e6-inch base length for stable contact across wide workpiece surfaces\u003c\/li\u003e\n\u003cli\u003eRatchet stop thimble delivers repeatable, consistent measuring pressure\u003c\/li\u003e\n\u003cli\u003eRing-type knurled lock nut allows quick and secure spindle locking\u003c\/li\u003e\n\u003cli\u003eSatin chrome finish reduces glare and resists corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard mechanical depth micrometer replacement or addition for professional precision measurement setups requiring up to 9 inches of depth range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis instrument requires no installation but should be handled and stored by a qualified machinist or metrologist familiar with precision measuring tools. Before use, clean the base and rod contact surfaces and verify zero calibration against a known reference surface. Store the rods in the supplied case to prevent damage to measuring surfaces and maintain accuracy. Do not overtighten the lock nut or drop the instrument, as this can affect calibration.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0001 to 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Length\u003c\/strong\u003e: 6 inches (152.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Rods\u003c\/strong\u003e: 9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Type\u003c\/strong\u003e: Rotating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Diameter\u003c\/strong\u003e: 5\/32 inch (3.97 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Ratchet Stop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLock Nut Type\u003c\/strong\u003e: Ring, Knurled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.438 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 52252\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541983592754,"sku":"52252","price":710.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/437da88fc4423ef74f8f768709618af5.jpg?v=1785888882","url":"https:\/\/voomisupply.com\/products\/starrett-52252-mechanical-depth-micrometer-9-inch-9-rod","provider":"Voomi Supply","version":"1.0","type":"link"}